Eaton VCP-W Series Instruction Book

Also see for VCP-W Series: Instructions for installation/operation/maintenance/servicing Instruction leaflet

Contents

14 Instruction Book IB182312EN June 2016 www.eaton.com50/75/150 VCP-WSelectable Ground and Test DeviceSECTION 5: INSTALLATION & INSPECTION WARNINGBEFORE PLACING THE SELECTABLE GROUND AND TEST DEVICE INSERVICE, CAREFULLY FOLLOW THE INSTALLATION PROCEDURE BELOWAND THE SAFE PRACTICES SET FORTH IN SECTION 2. NOT FOLLOWINGTHE PROCEDURE MAY RESULT IN INCORRECT SG&T DEVICE OPERATIONLEADING TO DEATH, BODILY INJURY, AND PROPERTY DAMAGE.When the SG&T device is first used and each time it is used in thefuture, it should be carefully examined and checked to make sure itis operating correctly.5.1 EXAMINATION FOR DAMAGEExamine the selectable ground and test device for loose or obviouslydamaged parts. Never attempt to install nor operate a damagedselectable ground and test device.5.1.1 NAMEPLATE VERIFICATIONVerify the information on the new SG&T device matches theinformation on the purchase order. If any discrepancies exist,notify Eaton’s Electrical Services & Systems for resolution prior toproceeding. DANGERFAILURE TO IDENTIFY THE ENERGIZED TERMINALS INSIDE THESWITCHGEAR CIRCUIT BREAKER COMPARTMENT WILL CAUSE DEATH,SERIOUS INJURY, AND/OR PROPERTY DAMAGE. USE NOT ONLY ARIGOROUS LOCK-OUT, TAG-OUT SCHEME BUT ALSO LOCALIZED TESTINGWITH APPROVED TESTING PROBES TO CONFIRM THAT THE CIRCUIT TO BEGROUNDED IS DE-ENERGIZED. CONFIRM THAT FOREIGN POWER SOURCESARE NOT BACK-FEEDING INTO THE DE-ENERGIZED BUS. CAUTIONWHEN THE SELECTABLE GROUND AND TEST DEVICE IS RACKED TOTHE ‘CONNECTED’ POSITION IN THE SWITCHGEAR CIRCUIT BREAKERCOMPARTMENT, THE LINE AND LOAD PRIMARY DISCONNECTS ENGAGETHE STATIONARY PRIMARIES. IF ONE SET OF PRIMARIES IS ENERGIZED,IT IS STRONGLY ADVISED THAT THE TERMINAL ACCESS DOOR REMAINCLOSED AND LOCKED TO BLOCK ACCESS TO THOSE TERMINALS. THEKIRK™ LOCKS (WHEN PROVIDED) SHOULD BE INCORPORATED IN A ‘LOCK-OUT, TAG-OUT’ SCHEME. USE APPROPRIATE LOCKING PROVISIONS TOPREVENT INADVERTENT ACCESS. THIS SELECTABLE GROUND AND TESTDEVICE MUST BE OPERATED BY A QUALIFIED OPERATOR USING A WELLMAINTAINED AND CERTIFIED ‘HOT STICK’. NOTICEBECAUSE THERE ARE UNIQUE APPLICATIONS AND A VAST VARIETY OFPOWER SYSTEMS, THE SAFE OPERATING PROCEDURE FOR THE USE OFTHIS SELECTABLE G&T MUST BE DEVELOPED BY THE END USER BEFORETHE SELECTABLE GROUND AND TEST DEVICE IS INSTALLED IN THECIRCUIT BREAKER COMPARTMENT.5.2 OPERATING PROCEDUREPlease totally familiarize all SG&T users with this operatingprocedure prior to inserting the SG&T into the circuit breakercompartment.5.2.1 SELECTABLE GROUND AND TEST DEVICEPREPARATIONUse the following guidelines to prepare the SG&T for insertion in acircuit breaker compartment.a. This selectable ground and test device has a hotstick operablemoving blade that is retained in a neutral position between theupper and lower terminals by a metal retainer. When the latchring handles are at a 90 degree angle to the front of the SG&T,the selector blades are retained in the neutral, parked position.Confirm that the removable insulating barriers are in placeabove and below the selector blades. THIS SG&T MUST BEINSTALLED IN THE CIRCUIT BREAKER COMPARTMENT WITHTHESE SELECTOR BLADES IN THE NEUTRAL POSITION.b. For SG&T devices equipped with Kirk™ Locks on the terminalaccess doors, use the Kirk™ key provided to release the specialbolt that is held by the Kirk™ locking system. Slide this boltfrom the Kirk™ lock on the SG&T front cover to allow the doorto be opened. The special bolt is retained on the door. SeeFigure 5.1.c. Access the terminal set to be grounded by opening the upperor lower access door. The access doors have friction-stylehinges that will hold the access door open. (See Figure 5.2).The tension of these friction hinges may be adjusted using aPhillips-type screw driver.d. Locate the three insulating barriers that separate theneutral position of the selector blades from the terminal setcompartment to be grounded (Figure 5.3). Each of these threebarriers must be removed to allow selector blade to swing tothe terminals to be grounded. These removable barriers shouldbe safely stored for re-installation before returning the SG&Tto its storage area. These barriers should be removed priorto installing the SG&T in the circuit breaker compartment andre-installed after the SG&T has been removed from the circuitbreaker compartment.e. Close the terminal access door prior to installing the G&T in thecircuit breaker compartment.f. Install the SG&T in the circuit breaker compartment followingthe instructions in paragraph 5.4 of this instruction bulletin.Use the Personal Protective Equipment (PPE) required by localauthorities having jurisdiction.5.2.2 SELECTABLE GROUND AND TEST DEVICEOPERATIONThe following procedures are intended to supplement, but notreplace, the site specific instructions developed by authorities havingjurisdiction for use of this selectable ground and test device.a. Using the appropriate PPE, open the terminal access door forthe terminals to be grounded. Verify that the SG&T terminalsare de-energized. Confirm that the friction hinges of theterminal access door holds the door open. Start at phase ‘a’,the pole to the left as one faces the SG&T.b. The terminal selector blade is moved from the neutral, parkedposition by using the hook of a ‘hotstick’ to move the latchring to the left slightly to free the blade from its retainer. Adownward force on the latch ring will move the blade to thelower terminal; upward force on the latch ring will move theblade to the upper terminal. A mechanism in the blades spreadsthem slightly as the latch ring is moved to allow proper bladeengagement with the stationary blades; a clamping and latchingaction is applied once the blade engages its mating terminal.c. Repeat steps ‘b’ for the center pole and the right pole of theSG&T respectively.d. With the selector blades fully engaged in the terminals, theblades are latched so that they cannot swing open in the eventthat the circuit is inadvertently energized.e. With the terminals safely grounded, perform the tasks and testsrequired as required. When that work is complete, proceed tostep ‘f’.f. Use the hotstick to hook the selector blade latch ring on theselector blade (Figure 5.4 and 5.5). Move the latch ring to movethe blade toward the neutral position between the terminals,Figure 5.6. Move the blade slightly to the left to clear theretaining ‘ears’ of the neutral position retainer then allow theblade to move to the right so that it is retained by the retainer.